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Mary Arnold — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Arnold across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1879), then head of a 3-person household.
Age 51
b. ~1879
Female
Spouse
Born: Scotland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 23 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1879 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Arnold | Head | — | 50 | ~1880 |
| Robert Arnold | Son | — | 18 | ~1912 |
| Mary Arnold | Spouse | — | 51 | ~1879 |
Census Appearances
1920
Cook, Illinois
Spouse, age 40
Cook, Illinois · implied b. ~1880 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1911 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | scotland |
1930
Cook, Illinois
Spouse, age 51
Cook, Illinois · implied b. ~1879 — 3 household members
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 23 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Cook-County, Illinois
Spouse, age 60
Cook-County, Illinois · implied b. ~1880 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Alien |
| Class of Worker | 0 |
| Highest Grade | S-5 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Arnold
Spouse · 1930 · age 51 · b. ~1879 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel432:0509)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James W Smith | 75 | Head | Locomotive Engineer | Ohio |
| 2 | John De Roy Smith | 37 | son | Fireman | Illinois |
| 3 | Elsie Smith | 35 | daughter-in-law | None | Illinois |
| 4 | William Smith | 15 | grand-son | None | Illinois |
| 5 | Robert Arnold | 50 | Head | Laborer | England |
| 6 | Mary Arnold THIS PERSON | 51 | Wife | None | Scotland |
| 7 | Robert Arnold | 18 | son | None | Illinois |
| 8 | Nick Krstincevich | 34 | Head | Laborer | Yugoslavia |
| 9 | Mary Krstincevich | 32 | Wife | None | Yugoslavia |
| 10 | George Krstincevich | 12 | son | None | Illinois |
| 11 | Kate Krstincevich | 6 | daughter | None | Illinois |
| 12 | Mary Krstincevich | 4 | daughter | None | Illinois |
| 13 | Milan Basara | 33 | Head | Pipe Fitter | Yugoslavia |
| 14 | Jeka Basara | 28 | Wife-H | None | Yugoslavia |
| 15 | Milan Basara | 6 | son | None | Iowa |
| 16 | Milka Basara | 3 | daughter | None | Illinois |
| 17 | Nikola Basara | 1 | son | None | Illinois |
| 18 | Mato Andrijasevich | 37 | Head | Laborer | Yugoslavia |
| 19 | Lucia Andrijasevich | 23 | Wife | None | Yugoslavia |
| 20 | Luka Andrijasevich | 0 | son | None | Illinois |
| 21 | Joseph Igorac | 42 | Head | Machinist | Yugoslavia |
| 22 | Ljuba Igorac | 36 | Wife-H | None | Yugoslavia |
| 23 | Fanny Igorac | 12 | daughter | None | Illinois |
| 24 | Edward Igorac | 10 | son | None | Illinois |
| 25 | Josephine Igorac | 9 | daughter | None | Illinois |
| 26 | Marko Detelich | 43 | Head | Laborer | Yugoslavia |
| 27 | Anne Detelich | 43 | Wife-H | None | Yugoslavia |
| 28 | George Detelich | 18 | son | Laborer | Illinois |
| 29 | Mike Detelich | 16 | son | None | Illinois |
| 30 | Ilija Detelich | 13 | son | None | Illinois |
| 31 | John Detelich | 11 | son | None | Illinois |
| 32 | Tom Detelich | 9 | son | None | Illinois |
| 33 | Mary Detelich | 7 | daughter | None | Illinois |
| 34 | Kate Detelich | 5 | daughter | None | Illinois |
| 35 | Mike Maras | 42 | Head | Laborer | Yugoslavia |
| 36 | Mary Maras | 44 | Wife-H | None | Yugoslavia |
| 37 | Kata Tillie Maras | 16 | daughter | None | Yugoslavia |
| 38 | Manda Maras | 8 | daughter | None | Illinois |
| 39 | Anna Maras | 7 | daughter | None | Illinois |
| 40 | Joe Maras | 5 | son | None | Illinois |
| 41 | Lucy Maras | 0 | daughter | None | Illinois |
| 42 | Angel Manconi | 40 | Head | Proprietor | Italy |
| 43 | La Reina Manconi | 38 | Wife-H | None | Italy |
| 44 | Osvaldo Manconi | 12 | son | None | Illinois |
| 45 | Dora Manconi | 8 | daughter | None | Illinois |
| 46 | John Nelson | 70 | Head | Retired | Sweden |
| 47 | Nelly Nelson | 66 | Wife | None | Sweden |
| 48 | Arthur Nelson | 28 | son | Fireman | Illinois |
| 49 | Peter Palermo | 25 | Head | Laborer | Illinois |
| 50 | Bella Palermo | 23 | Wife-H | None | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)